Mouse/window de-synchronization during window dragging (Video)

Status changed to 'Confirmed' because the bug affects multiple users.

I think the primary cause of this bug is that the move plugin uses relative movement;
   window->move(dx, dy)
whereas it should be absolute; something like:
   window->moveTo(x, y)

You can always know the coordinate of the title bar (or the window) that the user grabbed, and ensure you are always moving the window to a location that keeps the location of the pointer relative to the window constant.

On Tue, 21 Feb 2012, Daniel van Vugt wrote:

> I think the primary cause of this bug is that the move plugin uses relative movement;
> window->move(dx, dy)
> whereas it should be absolute; something like:
> window->moveTo(x, y)
>
> You can always know the coordinate of the title bar (or the window) that
> the user grabbed, and ensure you are always moving the window to a
> location that keeps the location of the pointer relative to the window
> constant.

Well really, plugins should use configureXWindow where possible, which
uses absolute co-ordinates. ::move is going away anyways / being moved (no
pun intended) into a deprecated codepath that uses configureXWindow....
when I get time to actually pick up my work on that again :(

>
> --
> You received this bug notification because you are a member of Compiz
> Maintainers, which is the registrant for Compiz Core.
> https://bugs.launchpad.net/bugs/886192
>
> Title:
> Mouse/window de-synchronization during window dragging (Video)
>
> Status in Compiz Core:
> Triaged
> Status in “compiz” package in Ubuntu:
> Confirmed
>
> Bug description:
> Example: http://www.youtube.com/watch?v=XQkmXSshgbQ
>
> ProblemType: Bug
> DistroRelease: Ubuntu 11.10
> Package: unity 4.24.0-0ubuntu2b1
> ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
> Uname: Linux 3.0.0-12-generic x86_64
> NonfreeKernelModules: fglrx
> .tmp.unity.support.test.0:
>
> ApportVersion: 1.23-0ubuntu4
> Architecture: amd64
> CompizPlugins: [core,bailer,detection,composite,opengl,decor,place,vpswitch,mousepoll,compiztoolbox,wall,grid,imgpng,resize,gnomecompat,session,snap,move,regex,animation,unitymtgrabhandles,workarounds,expo,fade,ezoom,scale,unityshell]
> CompositorRunning: compiz
> Date: Fri Nov 4 16:42:41 2011
> DistUpgraded: Log time: 2011-10-14 09:30:07.100128
> DistroCodename: oneiric
> DistroVariant: ubuntu
> DkmsStatus: fglrx, 8.902, 3.0.0-12-generic, x86_64: installed
> GraphicsCard:
> ATI Technologies Inc Juniper [Radeon HD 5700 Series] [1002:68b8] (prog-if 00 [VGA controller])
> Subsystem: PC Partner Limited Device [174b:1482]
> InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
> JockeyStatus:
> xorg:fglrx_updates - ATI/AMD proprietary FGLRX graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
> xorg:fglrx - ATI/AMD proprietary FGLRX graphics driver (Proprietary, Enabled, In use)
> MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
> ProcEnviron:
> PATH=(custom, user)
> LANG=de_DE.UTF-8
> SHELL=/bin/bash
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=4e6d264a-b802-401c-a60e-0ff10c31728e ro quiet splash vt.handoff=7
> SourcePackage: unity
> UpgradeStatus: Upgraded to oneiric on 2011-10-14 (21 days ago)
> dmi.bios.date: 06/24/2010
> dmi.bios.vendor: American Megatrends Inc.
> dmi.bios.version: P1.20
> dmi.board.name: 880GXH/USB3
> dmi.board.vendor: ASRock
> dmi.chassis.asset.tag: To Be Filled By O.E.M.
> dmi.chassis.type: 3
> dmi.chassis.vendor: To Be Filled By O.E.M.
> dmi.chassis.version: To Be Filled By O.E.M.
> dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.20:bd06/24/2010:svnT...

I know this is not a fix but a work around

install ccsm go to

snappining windows/behaviour/

uncheck edge resistance

seem's to work for me

The workaround worked for me too.

Added workaround to the Bug Description (thanks niclos69). Scroll up to the top of the bug to see it.

Is there anyone for whom the workaround doesn't work?

this but is in 12.04 as well.

lol I mean "bug" not "but".

confirming 12.04 as well

When I pull a window away from an edge, it doesn't restore the window's width, only the height. And when I pull a window away from the top, my cursor is on the window, but it's at the very top edge, not where I actually clicked. Running Ubuntu 12.04. Confirmed on both my desktop machine and my laptop.

Jonah, the issue with the window width is bug 878516.

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 201681, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.